<table>
  <tr>
    <td colspan="2">
      <h3 style="margin: 5px 0;">Options</h3>
    </td>
  </tr>
  <tr>
    <td>
      Merge geometries
    </td>
    <td>
      <input type="checkbox" id="mergeGeometries" name="mergeGeometries" value="1" checked>
    </td>
  </tr>
</table>
